Sash-lock



(No Model.) 2 Sheets-Sheet 1.

T. R. NICHOLS.

SASH LOOK.

Patented June 23, 1885.

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Patented June 23, 1885'.

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' UNITED STATES PATENT OFFICE.

THOMAS RAND NICHOLS, OF LYNN, MASSACHUSETTS.

SASH-LOCK.

SPECIFICATION forming part of Letters Patent No. 320,675, dated June 23, 1885.

Application filed April 13, 1885. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS RAND NICHOLS, of Lynn, in the county of Essex, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in Window-Sash Locks; and I do herebydeclare the same to be described in'the following specification, and represented in the accompanying drawings, of which- Figure 1 is a front view; Fig. 2, a rear elevation; Fig. 3, a side view of one of my improved duplex sash locks. Figs. 4 and 5 are longitudinal and medium sections thereof, one section exhibiting the mechanism to the right and the other that to the left of the plane of section. Fig. 6 is a transverse section, taken through one of the bolts. Fig. 7 is a horizontal section of the sashlock as arranged with a window-frame and the two sashes thereof. Fig. 8 is a front elevation, and Fig. 9 a vertical section, of the window -fra1ne and sashes provided with the duplex sash-lock. Fig. 10 is an edge view of the sashes, it showing the holes 0 in each for reception of the bolt. Fig. 11 is a side view of one of the bolts and its stud.

The nature of my invention is defined in the claim hereinafter presented.

In such drawings, A denotes a plate, having extended from its rear face two tubular bolt guides or projections, a I), each of which is slotted diametrically of it, as shown at c. In each of the said projectionsor guides, and extending through the plate A transversely thereof, is one of two bolts, 13 and O, which is adapted to slide freely in the projection or guide. From each bolt a stud, (1, extends into a groove, 6, made obliquely in one of two slides, D and E, arranged parallel to each other, and supported by suitable guides, f, so as to be capable of sliding lengthwise between such guides, which project from the plate A. The tubular bolt-guides are directly between the two slides.

Each slide, notched or recessed, as shown at 70, has a pin, 9, extending from it into the recess, in manner as represented, such pin going loosely through one of the guides, f, and

also through a spiral spring, h, that extends rearward from the guide f to the shoulder i,

from which the pin projects, such shoulder being the rear end of the said notch or recess R. Two knobs, F G, project rearward from the two slides, the shank of each knob being screwed into its slide.

The sash-lock thus constructed is to be let into the window-frame H, so as to extend across the two sashes I and K, when they, are closed, but not into them, the same being so that the dividing-head Z of the two sashes shall be midway between the two bolts 13 and G, and one bolt be directly opposite one, and the other bolt directly opposite the other sash. Each vertical sash-bar m, next the lock, is to be provided with a series of holes or recesses, 0, arranged in it at suitable distances apart, each hole being for reception of the bolt, when the hole is moved into a position to admit of such. The knobs extend through the windowframe and a guide -plate, 8, fixed thereto in manner as shown.

By pushing in the upper knob, the upper sash will be unlocked. So by pushing in the lower knob, the lower sash will be unlocked. The sashes are always looked while the knobs are untouched, so that before either sash can be moved either upward or downward the knob to operate its bolt has to be pushed to cause the bolt to be retracted from the sash. \Vhile various other sash-locks have to be manipulated to fasten the sashes, this one automatically locks them, whether they be open or closed, or whether one be" open and the other closed, and thus the attention of a servant or a housekeeper seldom or never is required at any time to ascertain whether th sashes are locked.

I claim- The duplex sash-lock, substantially as described, consisting of the support-plate provided with the slide and bolt-guides, the two bolts having studs, as described,.and of the two obliquely grooved bolt slides, and their impelling-knobs and retracting-springs, allbe ing arranged and applied essentially, and to operate as set forth.

THOMAS RAND NICHOLS.

Witnesses:

R. H. EDDY, S. N. PIPER; 

